CN101644911B

CN101644911B - Image quality adjustment method, image forming apparatus and computer readable medium

Info

Publication number: CN101644911B
Application number: CN2009101396895A
Authority: CN
Inventors: 大塚雅之
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2008-07-02
Filing date: 2009-07-02
Publication date: 2012-05-23
Anticipated expiration: 2029-07-02
Also published as: CN101644911A; JP2010014898A; US8081891B2; US20100003041A1; JP4568776B2

Abstract

The invention relates to an image quality adjustment method, an image forming apparatus and a computer readable medium. When an image forming job is completed that records onto a recording sheet an image formed on a photoconductor drum and conveys the recording sheet, a simple process control is carried out that forms some filled patch images with using some toners. After the simple process control is carried out, a determination is carried out, in accordance with a charge control value of a charge roller adjusted by the simple process control (a voltage value applied on the charge roller), whether a formal process control should be carried out or not that forms many patch images with using much toners. The formal process control is additionally carried out, when the determination means so.

Description

Image quality adjustment method, image processing system and computer readable medium

Technical field

The present invention relates to be used to adjust should be on recording sheet image quality adjustment method, image processing system, the computer readable medium of the image quality of images recorded.

Background technology

Image recording operation below the image processing system of electrofax modes such as duplicating machine, printer, facsimile unit is carried out; Thereby promptly photoconductor drum is made public and form electrostatic latent image; Thereby and make formed latent electrostatic image developing form the toner picture, and the toner that forms looked like to be recorded on the paper used for recording discharge through toner.

The developing apparatus that image processing system had roughly is divided into the developing apparatus of a composition visualization way of utilizing a composition toner and the developing apparatus of binary visualization way, the two-component developer that the utilization of said binary visualization way comprises nonmagnetic toner and has the carrier of magnetic.But, though because a composition visualization way is applicable to the miniaturization of developing apparatus, be inappropriate for rapid development, and the life-span of toner is short, the therefore general binary visualization way that adopts.

If the developing apparatus by the binary visualization way develops, then carrier is not consumed and stays device inside, but consumes nonmagnetic toner, thereby the inner toning dosage of device reduces.Because the minimizing of toning dosage causes the image quality variation,, suitably replenish nonmagnetic toner so that the toner concentration in the two-component developer is kept necessarily therefore in order to keep high image quality.

In addition, image processing system receives the influences such as variation of environmental baseline of deterioration and temperature, the humidity of photoconductor drum and two-component developer, and image quality changes.Therefore, in order to stablize image quality, general image processing system reaches and automatically adjusts image quality under the situation more than the regulation number having write down the image recording number of record images with paper after having adjusted image quality.

But owing to during the adjustment image quality, can not carries out image write down operation, therefore the user will wait for till the image quality adjustment finishes.That is, for the stability of the convenience that makes the user and image quality and deposit, understand fully that the timing of beginning image quality adjustment is important.

In recent years, various image quality adjustment technology (process/control technologys are disclosed.Below process/control is called process control), recently, come implementation process control according to the detailed image formation condition.

For example, the image that discloses based on monochromatic (monochrome) image and coloured image forms ratio, the image processing system ((Japan) spy opens the 2003-91224 communique) of the timing of adjustment implementation process control.Because the degree of requirement of the image quality of monochrome image is lower than coloured image; Therefore driving the image processing system of putting down in writing in the 2003-91224 communique (Japan) spy forms under the high situation of ratio at the image of monochrome image; Even the image recording number has reached more than the regulation number, do not implement process control yet.Its result does not implement useless process control, can not carries out image time of record operation shorten.Thereby, can make the user convenience and image quality stability and deposit.

In addition, disclose after the image recording end of job through the image processing system ((Japan) spy opens the 2006-220959 communique) of implementation process control under the situation of stipulated time.The time period that for example user does not use image processing system behind lunch break, end-of-job etc.; Because the time till beginning to next image recording operation after the image recording end of job is longer; Therefore in this time period implementation process control, thereby can make user's convenience and image quality stable and deposit.

In the image processing system of above that kind,, regulate the image quality adjusted value that is used to adjust image quality through implementation process control.As the image quality adjusted value; Use to the magnitude of voltage of the voltage that makes the charged charged device of photoconductor drum and apply (below; Be called charged controlling value) and the output valve of the exposure light source that is used for photoconductor drum is made public or output duty (duty) value (below, be called exposure control value).

For accommodation zone electric control value; Photoconductor drum is not made public, and charged device is applied the voltage with multiple charged controlling value, thus the toner that forms a color of a plurality of usefulness be coated with repairing (patch) image that the part of full photoconductor drum forms (below; Be called curing (solid) and repair image); And detect each curing that forms and repair the optical reflection concentration of image, thereby, calculate the charged controlling value of the optical reflection concentration of regulation based on testing result.

On the other hand; In order to regulate the gamma characteristic of medium tone, the limit changes the exposure control value limit makes public to photoconductor drum, thus repairing image that the image that forms colors (halftone) in the middle of tens utilizations on the photoconductor drum forms (below; Repair image in the middle of being called); And detect the middle optical reflection concentration of repairing image that forms, thereby based on testing result, the exposure control value of the gamma characteristic value that calculating can obtain stipulating.

Such as stated, in the enforcement of process control, need on photoconductor drum, form a plurality of repairing images, therefore consume a large amount of toners, and till process control finishes, need the long period.

Driving the image processing system of putting down in writing in the 2003-91224 communique (Japan) spy exists if will satisfy the condition of image recording number and the condition both sides that image forms ratio; Then just when the operation of carries out image record, implement the misgivings of long process control of required time.At this moment, generation user till process control finishes need wait for the inconvenience of long period.

In addition, in carries out image record operation process, do not implement process control though the spy drives the image processing system of putting down in writing in the 2006-220959 communique in (Japan), the required time of process control own is longer.

And, open the 2003-91224 communique (Japan) spy, (Japan) spy drives the image processing system of putting down in writing in the 2006-220959 communique, when implementation process is controlled, consume a large amount of toners and on photoconductor drum, forms the repairing image.Therefore, exist the toner that is used for document image on paper used for recording not enough, in addition, have along with the formation of image photoconductor drum and two-component developer deterioration, image quality is the misgivings of variation on the contrary.

For the consumption toning dosage of process of inhibition control, consider to reduce the enforcement frequency of process control.But, at this moment, can not realize the stability of image quality.

Summary of the invention

The present invention accomplishes in view of above situation; Its fundamental purpose is to provide image quality adjustment method, image processing system and computer readable medium; Based on the image quality adjusted value that the image quality adjustment that forms the repairing image of stated number through the image formation agent that utilizes ormal weight, judge and whether implement to utilize the image of Duoing to form the image quality adjustment that agent forms the repairing image of Duoing than stated number than ormal weight, only be judged to be this image quality adjustment of enforcement under the situation of enforcement; Thereby make the user convenience and image quality stability and deposit; And reduce the amount that the image that when image quality is adjusted, is consumed forms agent, and, image quality adjustment required time can be shortened.

In the present invention, in image processing system, adjustment should be on recording sheet the image quality of images recorded.Image processing system of the present invention comprises the image formation unit identical with general image processing system, transfer printing unit, transports unit and concentration detecting unit, for example, comes work according to the computer program based on image quality adjustment method of the present invention.

The end judging part of image processing system is carried out the end determination step that whether finishes that transports that is used to judge the recording sheet that transports the unit.Promptly; In finishing determination step; Judge whether a series of image recording operation finishes, said a series of image recording operation is for example according to user's operation, utilizes image to form agent and carries to put at image and form image on the body; Formed image is transferred on one or more recording sheet, and transports the image recording operation that has been transferred the record images sheet material.

In addition; The number counter block to adjusted transfer printing unit transfer printing after the image quality record number of record images sheet material count (prime of number determination step), the number judging part judges whether the record number that the number counter block has carried out counting is regulation number above (the back level of number determination step).In this number determination step,, judge whether there is the unsettled possibility of image quality through carrying out image recording operation several times.

Be judged to be end at the end judging part, and the number judging part is judged to be under the above situation of regulation number, that is, and the image recording end of job, and exist under the situation of the unsettled possibility of image quality, carry out the 1st image quality set-up procedure.

In the 1st image quality set-up procedure, regulate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded.Therefore, the 1st formation control assembly makes image formation unit utilize the image of ormal weight to form agent and carries the repairing image of putting formation stated number on the body at image.Then, the 1st concentration obtains parts and obtains the concentration that the 1st formation control assembly makes the repairing image of image formation unit formation through the concentration detecting unit.And the 1st calculating unit is obtained the concentration that parts are obtained based on the 1st concentration, calculate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded.At last, the 1st set parts is set the image quality adjusted value that the 1st calculating unit calculates to image formation unit, so that image formation unit utilizes the image quality adjusted value to form image.

On the other hand, in the 2nd image quality set-up procedure, be adjusted in identical image quality adjusted value of the image quality adjusted value regulated in the 1st image quality set-up procedure and/or different image quality adjusted values.Therefore, the 2nd form control assembly and make image that the image formation unit utilization Duo than ormal weight form agent to carry at image and put the repairing image that formation is Duoed than stated number on the body.Then, the 2nd concentration obtains parts and obtains the concentration that the 2nd formation control assembly makes the repairing image of image formation unit formation from the concentration detecting unit.Further, the 2nd calculating unit is obtained the concentration that parts are obtained based on the 2nd concentration, calculate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded.At last, the 2nd set parts is set the image quality adjusted value that the 2nd calculating unit calculates to image formation unit, so that image formation unit utilizes the image quality adjusted value to form image.

Through carrying out the 2nd image quality set-up procedure, the such formal image quality adjustment of the image quality adjustment of embodiment as in the past (below, be called regular image quality adjustment).If implement regular image quality adjustment, the lot of consumption image forms agent.In addition, form a plurality of repairing images, correspondingly required time is long till the image quality adjustment finishes.

On the other hand, through carrying out the 1st image quality set-up procedure, embodiment is as than the simple simple image quality adjustment of image quality adjustment in the past (below, be called simple image quality adjustment).Even carry out the 1st image quality set-up procedure, can not form agent by the lot of consumption image yet.In addition, do not form a plurality of repairing images, correspondingly the required time lacks till the image quality adjustment finishes.

In the execution of image recording operation, do not implement the adjustment of simple graph matter, after the operation of carries out image record, then implement simple image quality adjustment more than the regulation number if the record number reaches.

If, just can make image quality stable, then needn't carry out regular image quality adjustment through implementing simple image quality adjustment.But, only be difficult to continual and steady image quality through simple image quality adjustment.Thereby enforcement only consumes few images and forms agent usually, and the short simple image quality adjustment of required time, once in a while, consume a large amount of images and form agent, and the long regular image quality adjustment of required time.

Therefore, implement judging part and carry out the enforcement determination step, the image quality adjusted value that said enforcement determination step calculates based on the 1st calculating unit (the image quality adjusted value of promptly regulating in the 1st image quality set-up procedure) is judged the adjustment of whether further implementing image quality.

Then, be judged to be under the situation of enforcement, carry out the 2nd image quality set-up procedure at the enforcement judging part.That is, even the record number has reached more than the regulation number, also unqualified is certain regular image quality adjustment of implementing, but under the situation that only can not stablize image quality through simple image quality adjustment, implements.

In the present invention, the accumulation parts of image processing system are accumulated the absolute value of the difference of image quality adjusted value that in simple image quality adjustment, calculates and the image quality adjusted value that in regular image quality adjustment, calculates after implementing regular image quality adjustment.

Accumulation results at the accumulation parts is under the situation more than the setting, and the enforcement judging part of image processing system is judged to be implements regular image quality adjustment.Wherein, the accumulation results of accumulation parts is that the above situation of setting is corresponding to the situation that only can not stablize image quality through simple image quality adjustment.

Suppose; If the absolute value of the difference of the image quality adjusted value that calculates in image quality adjusted value that in simple image quality adjustment, calculates and the regular image quality adjustment is a structure of implementing regular image quality adjustment under the situation more than the setting; Then under the absolute value of the difference of the image quality adjusted value of the regular and simple image quality adjustment situation littler, only implement simple image quality adjustment than setting, and the regular image quality adjustment of nonvoluntary enforcement; There are the misgivings of image quality deterioration in its result.

On the other hand; Under the accumulated value and situation that setting compares of the absolute value of difference; Though the absolute value of the difference between the image quality adjusted value in the regular and simple image quality adjustment is littler than setting; But accumulation results slowly becomes greatly, and therefore if implement simple image quality adjustment repeatedly, then regular image quality adjustment is always implemented.Its result can be with the image quality adjustment that suitably frequency enforcement is regular.

In the present invention, through implementing simple image quality adjustment, the 1st forms control assembly makes image formation unit utilize the image formation agent of ormal weight to carry the curing repairing image of putting formation stated number on the body at image.Then, the 1st concentration obtains parts and obtains the concentration that the 1st formation control assembly makes the curing of image formation unit formation repair image from the concentration detecting unit.And then the 1st calculating unit is obtained the concentration that parts are obtained based on the 1st concentration, calculate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded.At last, the 1st set parts sets the image quality adjusted value that the 1st calculating unit calculates to image formation unit, so that image formation unit utilizes the image quality adjusted value to form image.

On the other hand, through implementing regular image quality adjustment, the 2nd forms control assembly makes image formation unit utilize the image formation agent of ormal weight to carry the curing repairing image of putting formation stated number on the body at image.In addition, the 2nd formation control assembly forms image formation unit and solidifies and repairs the different repairing image of image.That is, the 2nd form control assembly and make image that the image formation unit utilization Duo than ormal weight form agent to carry at image and put the repairing image that formation is Duoed than stated number on the body.

Then, the 2nd concentration obtains parts and obtains the concentration that the 2nd formation control assembly makes the curing of image formation unit formation repair image and repair the different repairing image of image with curing respectively from the concentration detecting unit.

And then the 2nd calculating unit is obtained the concentration that image is repaired in curing that parts obtain based on the 2nd concentration, calculate be used to adjust should be on recording sheet the 1st image quality adjusted value of the image quality of images recorded.The 1st image quality adjusted value is identical value with the image quality adjusted value of when the simple image quality of enforcement is adjusted.In addition, the 2nd calculating unit is obtained the concentration of the different repairing image that parts obtain based on the 2nd concentration, calculate be used to adjust should be on recording sheet the 2nd image quality adjusted value of the image quality of images recorded.The 2nd image quality adjusted value is a variety classes with the 1st image quality adjusted value generally.

At last, the 2nd set parts sets the 1st and the 2nd image quality adjusted value that the 2nd calculating unit calculates to image formation unit, so that image formation unit utilizes the image quality adjusted value to form image.

That is, through regular and simple image quality adjustment, the relevant image quality adjusted value that solidifies image is adjusted.The main key element that is used to realize the stabilization of image quality is that the concentration with regulation forms and solidifies image.Thereby, can realize the stabilization of image quality through simple image quality adjustment.

In addition; Adjusting under the situation of image quality adjusted value based on solidifying the concentration of repairing image; With the repairing image that for example forms based on the image that utilizes medium tone (promptly; The middle image of repairing) concentration and the situation of adjusting the image quality adjusted value is compared can reduce the number of the repairing image that should form, and therefore can contribute the saving that image forms agent.

On the other hand; Under the situation of implementing regular image quality adjustment; Also form and solidify the repairing image of repairing beyond the image (repairing image for example), adjust the image quality adjusted value, therefore can further realize the stabilization of image quality based on the concentration of formed repairing image.

And,, therefore compare treatment step that can the simplified image adjustment because the treatment step of adjustment of can partial common regular image quality and simple image quality adjustment with the situation that enforcement and regular image quality are adjusted diverse simple image quality adjustment.Therefore, for example, after having implemented simple image quality adjustment, implement under the situation of regular image quality adjustment, in regular image quality adjustment, omit and the identical treatment step of simple image quality adjustment, form agent thereby can practice thrift image, and shorten required time.

In the present invention, form image on the body carrying to put through the charged image of charged elements.At this moment, the magnitude of voltage (that is charged controlling value) that is applied to the voltage of charged elements with carry the concentration of putting the image that forms on the body at image direct relation arranged.Thereby, in regular image quality adjustment and simple image quality adjustment, utilize charged controlling value as the image quality adjusted value that should calculate, be based on image and carry the concentration of putting the repairing image that forms on the body, calculate charged controlling value, thereby can adjust image quality easily.

In addition; Judging under the whether suitable situation of the regular image quality adjustment of enforcement through image quality adjusted value that relatively in regular image quality is adjusted, calculates and the image quality adjusted value that in simple image quality adjustment, calculates; Can pass through relatively employed charged controlling value in regular and simple two image quality adjustment, thereby judge easily.

In the present invention; Be based on the image quality adjusted value that calculates in the simple image quality adjustment, judge and whether implement regular image quality adjustment, but this moment; According to having adjusted what of the accumulation number after the image quality record number that has write down the record images sheet material accumulated, change decision condition.

The accumulation number is meant that image carries more and puts body and image and form agent etc. through using and deterioration repeatedly.Therefore, the accumulation number is many more, the easier deterioration of image quality.

Thereby, under the many situation of accumulation number, through change decision condition so that image quality is adjusted frequency height, thereby even the accumulation number becomes many, also can make the image quality stabilization.On the other hand, under the few situation of accumulation number, change decision condition, thereby user's convenience is improved so that the frequency of image quality adjustment is low.

In addition, the predetermined timing (when for example, dispatching from the factory the back energized) that is accumulated in of record number begins.

In the present invention; To at the image quality adjusted value of implementing in simple image quality adjustment, to calculate regular image quality adjustment back, accumulate with the absolute value of the difference of the image quality adjusted value that in regular image quality adjustment, calculates; In accumulation results is under the situation more than the setting, be judged to be to implement regular image quality adjustment, but this moment; According in the increase of accumulation number of record number of record images sheet material of having adjusted cumulative record after the image quality, setting is reduced.

The accumulation number is meant that image carries more and puts body and image and form agent etc. through using and deterioration repeatedly.Therefore it is many more to accumulate number, the easier deterioration of image quality.

Thereby the accumulation number increases, and setting is reduced, thereby can improve the frequency of image quality adjustment, therefore, even the accumulation number increases, also can make the image quality stabilization.On the other hand, under the few situation of accumulation number,, therefore can reduce the frequency of image quality adjustment, therefore, user's convenience is improved because setting is big.

In the present invention, the various parts that utilize the hardware elements of computing machine that image processing system of the present invention is had are realized with software mode, and this image processing system is worked as employed image processing system in image quality adjustment method of the present invention.

Form device according to image quality adjustment method of the present invention and image quality,, therefore can in the image recording operation process, interrupt images not write down operation and implement the image quality adjustment owing to after the image recording end of job, implement simple image quality adjustment.Thereby, can prevent in the image recording operation process beginning image quality adjustment, the situation till the user waits for and finishing to the image quality adjustment.

And, because simply image quality adjustment required time is short, even therefore in the image quality adjustment, write down operation by the user expectation carries out image, the situation till the adjustment of wait as long for to image quality finishes can not appear yet.

In addition, can not make under the situation of image quality stabilization, can implement regular image quality adjustment through simple image quality adjustment.Therefore, can remain certain image quality.

Promptly; Can, the simple image quality of only utilizing few images to form agent not implement to utilize great amount of images to form the regular image quality adjustment of agent continually in ground as adjusting; But implement as required; Therefore suppress in addition, to suppress the situation that photoconductor drum and image form the agent deterioration owing to implementing the not enough situation of image formation agent that the image quality adjustment is used for document image on paper used for recording.And, need not to reduce the frequency of image quality adjustment itself in order to suppress image to form the consumption of agent.

Above result, make the user convenience and image quality stability and deposit, and the image that consumes when reducing the image quality adjustment forms the amount of agent, and can shorten image quality adjustment required time.

According to computer readable medium of the present invention, image processing system is in the past worked as employed image processing system (being image processing system of the present invention) in image quality adjustment method of the present invention.Thereby, be not only the structure of making image processing system of the present invention and dispatching from the factory, can also the image processing system that dispatch from the factory be constituted image processing system of the present invention.

Through following detailed description with reference to accompanying drawing, it is clear that target of the present invention and characteristic will become.

Description of drawings

Fig. 1 is the front view (FV) of the inner structure of the summary image processing system of representing embodiment of the present invention.

Fig. 2 is the block scheme of major part structure of the image processing system of expression embodiment of the present invention.

Fig. 3 is illustrated in the process flow diagram that the image of carrying out in the image processing system of embodiment of the present invention forms processed steps.

Fig. 4 is illustrated in the process flow diagram that the subroutine of treatment step is implemented in the simple procedure control of carrying out in the image processing system of embodiment of the present invention.

Fig. 5 is the synoptic diagram of an example of the setting table stored in the storage unit that image processing system had of expression embodiment of the present invention.

Fig. 6 is illustrated in the process flow diagram that the subroutine of treatment step is implemented in the N-process control of carrying out in the image processing system of embodiment of the present invention.

Embodiment

Below, based on the accompanying drawing of representing embodiment of the present invention the present invention is detailed.

Fig. 1 is the front view (FV) of the inner structure of the summary image processing system 100 of representing embodiment of the present invention.

Image processing system 100 is gone up record polychrome or monochromatic image based on reading view data that the image of original copy with paper form, or the view data that receives via LAN, telecommunication cable etc. at paper used for recording (recording sheet).For this reason, image processing system 100 comprise exposing unit E, image formation unit pa, pb, pc, pd, intermediate transfer belt 11, secondary transfer roller 14, fixing device 15, with paper transfer path P1, P2, P3, paper feeding cassette 16, manual feed trays 17 and discharge tray 18 etc.

In image formation unit pa, pb, pc, pd, utilization is carried out image formation with the corresponding view data of each form and aspect of 4 colors of trichromatic green grass or young crops (C), pinkish red (M) and the Huang (Y) of the substractive color mixing of deceiving (K) and obtaining as coloured image being carried out color decompose.Below; With label pa, pb, pc, pd likewise; For 101,102,103,104,13,23 (with reference to Fig. 2), with give under the black corresponding situation a, with blue or green corresponding situation under give b, with the corresponding situation of magenta under give c and with the corresponding situation of Huang under give d and distinguish.

Image formation unit pa～pd is mutual roughly the same structure, comprises photoconductor drum 101a～101d, developing apparatus 102a～102d, charged roller 103a～103d, cleaning unit 104a～104d and primary transfer roller 13a～13d etc.

It is that film about 100 μ m～150 μ m forms that intermediate transfer belt 11 utilizes thickness, is forming the mobile route that is erected at the loop shape between driven roller 11a and the driven voller 11b above photoconductor drum 101a～101d.

On the rotation moving direction (sub scanning direction) of intermediate transfer belt 11, set a row image formation unit pa～pd.Thereby below the periphery of intermediate transfer belt 11, photoconductor drum 101d, photoconductor drum 101c, photoconductor drum 101b and photoconductor drum 101a are with this order relatively.With each relative position of photoconductor drum 101a～101d, being situated between has intermediate transfer belt 11 configuration primary transfer roller 13a～13d.Below, each position that intermediate transfer belt 11 is relative with photoconductor drum 101a～101d is called the primary transfer position.

Each of charged roller 103a～103d is to make the charged device of the surperficial uniform charged of photoconductor drum 101a～101d for the way of contact of the current potential of regulation.In addition, replace charged roller 103a～103d, also can use the charged device of the way of contact that has utilized brushed, perhaps, utilized the charged device of the noncontact mode of live line.

Exposing unit E comprises not shown semiconductor laser irradiation unit, polygonal mirror 4 and the 1st catoptron and the 2nd catoptron 8 etc., will shine photoconductor drum 101a～101d respectively through the laser beam that the view data of each black, blue or green, pinkish red and yellow form and aspect is modulated.Its result forms the electrostatic latent image of the view data of each black, blue or green, pinkish red, yellow form and aspect respectively in photoconductor drum 101a～101d.

Developing apparatus 102a～102d takes in respectively and comprises the two-component developer that forms the toner of agent as image; Surface to photoconductor drum 101a～101d of having formed electrostatic latent image provides toner, thereby and forms the toner picture through electrostatic latent image is developed.That developing apparatus 102a～102d takes in is black, blue or green, the toner of pinkish red and yellow each form and aspect, will turn to the toner picture of black, blue or green, magenta and yellow each form and aspect at the latent electrostatic image developing of each form and aspect of each formation of photoconductor drum 101a～101d.

Look like to be transferred on the intermediate transfer belt 11 in order to carry the toner of putting on the surface of photoconductor drum 101a～101d, through deciding Control of Voltage, be applied to primary transfer roller 13a～13d respectively with the primary transfer bias voltage of the charged polarity opposite polarity of toner.Like this, the overlapping successively outer peripheral face that is transferred to intermediate transfer belt 11 of toner picture of each form and aspect that form at photoconductor drum 101a～101d forms panchromatic toner picture at the outer peripheral face of intermediate transfer belt 11.

Therefore; Each primary transfer roller 13a～13d is that to cover metal (for example stainless steel) with diameter 8mm～10mm through the resilient material that utilizes electric conductivity (for example EPDM rubber or foamed polyurethane rubber etc.) be that the surface of the axle of material constitutes, and the resilient material through electric conductivity applies high voltage equably to middle transfer belt 11.

Wherein, Under the situation of the view data of the part of only yellow, pinkish red, the blue or green and black form and aspect of input; In 4 photoconductor drum 101a～101d, only in the photoconductor drum of a part corresponding, carry out the formation of electrostatic latent image and toner picture with the form and aspect of the view data that is transfused to.For example, when monochrome image forms, only in the photoconductor drum 101a corresponding, carry out the formation of electrostatic latent image and the formation of toner picture, at the outer peripheral face of the intermediate transfer belt 11 transfer printing toner picture of deceiving only with black form and aspect.

Each of cleaning unit 104a～104d is removed/is recovered in after development/image transfer printing the toner at the last remained on surface of photoconductor drum 101a～101d.

In each the primary transfer position of photoconductor drum 101a～101d, be transferred to the toner picture of the outer peripheral face of intermediate transfer belt 11; Rotation through intermediate transfer belt 11 is moved; Be sent to and the relative position of secondary transfer roller 14 (below, be called the secondary transfer printing position).When image formed, secondary transfer roller 14 was pressed against the outer peripheral face of intermediate transfer belt 11 that inner peripheral surface touches the side face of driven roller 11a through interlock (nip) pressure of regulation.The paper used for recording that provides from paper feeding cassette 16 or manual feed trays 17 is between through secondary transfer roller 14 and intermediate transfer belt 11 when (being the secondary transfer printing position), and secondary transfer roller 14 is applied in the high voltage with the charged polarity opposite polarity of toner.Like this, from the outer peripheral face of middle transfer belt 11 surface transfer toner picture to paper used for recording.

Wherein, In order to prevent from photoconductor drum 101a～101d disengaging and attached to the toner on the intermediate transfer belt 11; Be not transferred on the paper used for recording and remain in toner on the intermediate transfer belt 11, it is reclaimed through cleaning unit 12 to the colour mixture of next step.

The paper used for recording that has been transferred the toner picture imports to fixing device 15, and through being heated between warm-up mill 15a and the backer roll 15b and pressurizeing.Like this, the toner picture firmly photographic fixing on the surface of paper used for recording.Photographic fixing the paper used for recording of toner picture be discharged to discharge tray 18 through exit roller 18a.

As above such, the image that the toner that utilizes each color forms at least one of photoconductor drum 101a～101d is transferred on the paper used for recording, thereby is discharged to (image recording operation) on the discharge tray 18.

In image processing system 100, be provided be used for the paper used for recording of taking at paper feeding cassette 16 via secondary transfer printing position and fixing device 15 and transport discharge tray 18 the summary vertical direction with paper transfer path P1.On with paper transfer path P1, disposed with more than of the paper used for recording in the paper feeding cassette 16 produce with the pick-up roller 16a in the paper transfer path P1, the paper used for recording that will be produced to above the transfer roller r, the exit roller 18a that the paper used for recording that sends is imported to the aligning roller 19 of secondary transfer printing position and paper used for recording is discharged to discharge tray 18 with predetermined timing that transport.

In addition; In image processing system 100; From manual feed trays 17 to aligning roller 19; Formed with paper transfer path P2, said with disposed on the paper transfer path P2 be used for the pick-up roller 17a that produces at more than of the paper used for recording of placing on the manual feed trays 17 and with the paper used for recording that produces to above transfer roller r, r, the r of transmission.And through from exit roller 18a configuration transfer roller r, r between with the upstream side of the aligning roller 19 of paper transfer path P1, thereby formation is with paper transfer path P3.

Exit roller 18a to positive and negative two directions rotation freely; When the one-sided image that forms image at the single face of paper used for recording forms, and when the 2nd image that the dual-side image of the two-sided formation image of paper used for recording forms forms, drive and paper used for recording is discharged to discharge tray 18 to direct rotational direction.On the other hand; When the 1st image formation that dual-side image forms; Until the rear end of paper used for recording through exit roller 18a till the fixing device 15 after direct rotational direction drives, drive and paper used for recording imported to paper transfer path P3 to the despining direction with the state of the rearward end of seizing paper used for recording on both sides by the arms.Like this, when dual-side image forms, only formed record images and used paper, imported to paper transfer path P1 with the state of overturn pros and cons and front and back end at single face.

The paper used for recording that aligning roller 19 will provide from paper feeding cassette 16 or manual feed trays 17, or via paper used for recording, to import to the secondary transfer printing position with the synchronous timing of the rotation of intermediate transfer belt 11 with paper transfer path P3 transmission.Therefore; Aligning roller 19 stops the rotation when the action of photoconductor drum 101a～101d and intermediate transfer belt 11 begins, and before the rotation of intermediate transfer belt 11, provides or the paper used for recording that transmits stops at mobile with in the paper transfer path P1 with its front end and aligning roller 19 state of contact.After this, aligning roller 19 is in the position that secondary transfer roller 14 and intermediate transfer belt 11 compress, and begins rotation in the relative timing of leading section of the leading section of paper used for recording and the toner picture that on intermediate transfer belt 11, forms.

Wherein, in image formation unit pa～pd whole, carry out full-colour image that image forms when forming, primary transfer roller 13a～13d is pressed on the whole of photoconductor drum 101a～101d with intermediate transfer belt 11.On the other hand, when the monochrome image that only in image formation unit pa, carries out image formation formed, only primary transfer roller 13a was pressed on photoconductor drum 101a with intermediate transfer belt 11.

Fig. 2 is the block scheme of major part structure of the image processing system 100 of expression embodiment of the present invention.300 is record cells among the figure, and record cell 300 comprises various piece shown in Figure 1 and the record control unit 30, counter 221,222, the reflection density sensor 23a～23d that utilize processor to form.The action of record cell 300 is controlled through record control unit 30.In addition, 301 is sheet material delivery units among the figure, and sheet material delivery unit 301 comprises the formation various piece with paper delivery unit P1, P2, P3 (for example transfer roller r and exit roller 18a etc.) shown in Figure 1.

Image processing system 100 also comprises the image quality adjustment unit 20 and storage unit 21 that utilizes processor to form.

Store charged controlling value, accumulation number and the cumulative error score value of stating after each through image quality adjustment unit 20 in the storage unit 21, in addition, store regulation number, setting table and the computer program stated after each in advance.In addition, storage unit 21 for example can be made up of EEPROM, also can be made up of ROM and RAM.

Image quality adjustment unit 20 comes work according to the computer program of storage in storage unit 21.This program is based on the computer program (being computer program of the present invention) of image quality adjustment method of the present invention.

Therefore; For example; Control basal plate through appending combinations such as storage unit 21 that computer program of the present invention has been installed and image quality adjustment unit 20 in the past image processing system, or the control basal plate that image processing system had in the past is replaced by this control basal plate, thereby composing images forms device 100 easily.Thereby the image processing system of for example easily the user having been bought is replaced by image processing system 100.

In record cell 300, operating under the situation of not shown start button the various piece of record control unit 30 control recording unit 300, thereby the operation of carries out image record through the user.Its result, for example, the duplicating image of the image that one or more the original copy of in not shown manuscript handling device, placing is put down in writing on paper respectively the step record through above-mentioned that kind on paper used for recording.

Under the situation of the image recording end of job, to image quality adjustment unit 20, output is used for the end of job signal of the situation of the presentation video record end of job from record control unit 30.

Counter 221,222 is all by record control unit 30 control, and the number of the paper used for recording that is provided to the secondary transfer printing position is counted, and under the situation of the simple procedure control of stating after the enforcement, is reset to " 0 " through image quality adjustment unit 20 count results.That is, 221,222 pairs in counter has been implemented to write down after the simple procedure control record images and has been counted with the number of paper (below, be called and write down number).Wherein, counter 221 is only counted coloured image, and counter 222 is only counted monochrome image.In addition, when dual-side image forms, even paper used for recording itself is one, be counted as 2 with the number of paper but write down record images.

Image quality adjustment unit 20 is through carrying out additive operation with the count results of counter 221,222, thereby calculates the total (below, be called the accumulation number) of the record number after dispatching from the factory, and is stored in storage unit 21.In addition, the accumulation number of storage for example is replaced by under the situation of new product at photoconductor drum 101a～101d and developing apparatus 102a～102d in storage unit 21, also can be reset to " 0 ".

Reflection density sensor 23a～23d detects the optical reflection concentration at the last image that forms of photoconductor drum 101a～101d.

Then, N-process control and simple procedure control are described.For the image quality that makes images recorded on paper used for recording is stablized, satisfying each process control of enforcement under the situation of rated condition.

For example, N-process is controlled at when power supply is inserted in the back of dispatching from the factory and implements for the first time.In addition, of the back, after the control of enforcement simple procedure,, judge and whether implement N-process control based on the result of implementation of simple procedure control, when being judged to be enforcement, and then implement N-process control.

In addition, simple procedure control is in the moment of the image recording end of job, and the record number that counter 221,222 is counted respectively reaches under the situation more than the regulation number of in storage unit 21, storing to be implemented.Wherein, the regulation number is 50 in coloured image, is 100 in monochrome image.In more detail; About monochrome image; Reached under the situation more than the regulation number at the record number, implemented only the simple procedure of image formation unit pa to be controlled (the simple procedure control of monochrome image), about coloured image; Reached under the situation more than the regulation number at the record number, implemented simple procedure control (the simple procedure control of coloured image) all image formation unit pa～pd.

In the N-process control of this embodiment, at first, implement high concentration and use process control, then, implement the medium tone process control.High concentration is meant the process control that is used for the concentration of the curing image that on paper used for recording, writes down is maintained the concentration of regulation with process control; As the image quality adjusted value, regulate the charged controlling value be used to make the charged charged roller 103a～103d of each photoconductor drum 101a～101d (with reference to after the S41 shown in Figure 6～S44) that states.The medium tone process control is meant the process control that is used for the gamma characteristic of medium tone is maintained the gamma characteristic of regulation, and as the image quality adjusted value, the exposure control value of regulating exposing unit E is (with reference to S45 shown in Figure 6～S48).

On the other hand, in simple procedure control, implement the high concentration identical with process control with the process control (S31 shown in Figure 4 that states after the reference～S34) with the high concentration of in N-process control, implementing.

In addition, after implementing simple procedure control, at the appointed time under the situation with interior enforcement N-process control, also can be omitted in high concentration in the N-process control, only implement the medium tone process control with the enforcement of process control.

Fig. 3 is illustrated in the process flow diagram that the image of carrying out in the image processing system 100 of embodiment of the present invention forms processed steps.

Image quality adjustment unit 20 is judged the image recording operation that in record cell 300, whether is through with, and promptly judges from record control unit 30 whether imported end of job signal (S11).Image quality adjustment unit 20 among the S11 works as finishing judging part.

Under the situation of not importing end of job signal (S11:NO); That is, in the implementation of image recording operation, after the processing of the S13 that perhaps after having carried out, has stated; Under the situation that the image recording operation does not also once also begin, image quality adjustment unit 20 is carried out the processing of S11 repeatedly.Its result in the implementation of image recording operation, does not implement various image quality adjustment (process control).In addition, when not needing implementation process control not beginning the image recording operation, can invalidly not implement various process control.

Under the situation of image recording operation of in record cell 300, being through with (step S11: be); Image quality adjustment unit 20 is obtained 221,222 record numbers of counting respectively (S12) of counter; Read in the storage unit 21 each regulation number of coloured image and the monochrome image of storage, thereby judge whether the record number of the coloured image of in the processing of S12, obtaining and the record number of monochrome image have reached respectively more than the regulation number that reads (S13).Image quality adjustment unit 20 in S13 works as the number judging part.

At the record number of coloured image regulation number less than coloured image; And (S13: not) under the situation of the record number of monochrome image less than the regulation number of monochrome image; Owing to need not implement various process control; Therefore image quality adjustment unit 20 is not implemented simple procedure control and is not implemented N-process control yet, handles and returns S11.

Record number at coloured image is more than the regulation number of coloured image; Perhaps the record number of monochrome image is under the above situation of the regulation number of monochrome image (S13: be); Image quality adjustment unit 20 is the accumulation number that the count results of the counter 221,222 more than the regulation number is added to storage in storage unit 21 through writing down number, thus calculating cumulative number (S14).In this embodiment, illustration is used for structure that both of the record number of the record number of coloured image and monochrome image are accumulated, but also can calculate the accumulation number of coloured image and the accumulation number of monochrome image respectively.

After the finishing dealing with of S14; It is that the count results of the above counter 221,222 of regulation number is reset to " 0 " (S15) that image quality adjustment unit 20 will write down number, is used to carry out subroutine (with reference to Fig. 4) that simple procedure control implements to handle (S16) thereby access and carry out.At this moment, under the situation of record number less than the regulation number of counter 221 countings, implement only the simple procedure of image formation unit pa to be controlled (the simple procedure control that is monochrome image).In addition; Also can be under the situation of the simple procedure control of implementing coloured image, in S14, both count results of counter 221,222 are added to the accumulation number of storage in storage unit 21; And in S15, both count results of counter 221,222 are reset to " 0 ".

Below, will be called simple charged controlling value through the charged controlling value that the high concentration in the simple procedure control is regulated with process control, will be called regular charged controlling value through the charged controlling value that the high concentration in the N-process control is regulated with process control.The charged controlling value of storage is nearest regular charged controlling value (S22 that states after the reference) in storage unit 21.

Fig. 4 is illustrated in the process flow diagram that the subroutine of treatment step is implemented in the simple procedure control of carrying out in the image processing system 100 of embodiment of the present invention.

Below, illustration charged roller 103a, but for each of charged roller 103b～103d, accommodation zone electric control value too.

When image processing system 100 dispatches from the factory, charged roller 103a is for example applied-1250V, at this moment, as the surface potential of photoconductor drum 101a and obtain-650V.

Image quality adjustment unit 20 controlling recording control modules 30, image (S31) is repaired in the rectangular-shaped curing that forms 3 each 30mm angles.3 solidify the repairing image is concentration different black curing image each other.

Under the situation of the processing of having carried out S31; Record control unit 30 at first applies the voltage with charged controlling value (S34 and the S44 that state after the reference) of in record control unit 30, setting to charged roller 103a, thereby is coated with the part of full photoconductor drum 101a with black toner.Its result forms the 1st and solidifies the repairing image.Then, 30 couples of charged roller 103a of record control unit apply has the voltage that this charged controlling value is added the charged controlling value of 50V, thereby is coated with other the part of full photoconductor drum 101a with black toner.At last, 30 couples of charged roller 103a of record control unit apply has the voltage that deducts the charged controlling value of 50V from this charged controlling value, thereby is coated with other the part again of full photoconductor drum 101a with black toner.Above result forms the 2nd and the 3rd and solidifies the repairing image.

Forming under the situation of solidifying the repairing image, record control unit 30 does not carry out the exposure of exposing unit E to photoconductor drum 101a.

Image quality adjustment unit 20 among the S31 forms control assembly as the 1st and works.

Then; Image quality adjustment unit 20 is obtained the testing result of reflection density sensor 23a; Promptly; The optical reflection concentration (S32) of image is repaired in the curing that on photoconductor drum 101a, forms, and based on the optical reflection concentration that is obtained, is similar to the charged controlling value (S33) of calculating the optical reflection concentration that can obtain stipulating through for example straight line.Image quality adjustment unit 20 among the S32 utilizes reflection density sensor 23a, obtains parts as the 1st concentration and works, and the image quality adjustment unit 20 among the S33 works as the 1st calculating unit.

At last, the simple charged controlling value that will in S33, calculate of image quality adjustment unit 20 (for example-1280V) is set in record cell 300 and as the magnitude of voltage (S34) that when image forms, is applied to the voltage of charged roller 103a next time.Image quality adjustment unit 20 among the S34 works as the 1st set parts.

In more detail; The simple charged controlling value of in S33, calculating stores non-volatile storer that record cell 300 is for example had into, and record control unit 30 is utilized in the simple charged controlling value of storing in this storer and controls the voltage that applies on the charged roller 103a.As above such, accommodation zone electric control value.

After the finishing dealing with of S34, image quality adjustment unit 20 returns processing to original program (routine).

That kind as shown in Figure 3; After S16 finishes; Image quality adjustment unit 20 read out in the storage unit 21 storage regular charged controlling value (for example-1275V), and the absolute value of the difference of the simple charged controlling value calculated in implementing to handle of the simple procedure control of calculating the charged controlling value of being read and S16 (be 5V this moment.Be called difference value below) (S17), and the difference value that is calculated is added in the storage unit 21 the cumulative error score value of storage, thus calculating cumulative difference value (S18).The image quality adjustment unit 20 of S18 works as the accumulation parts.

Then, image quality adjustment unit 20 is based on the accumulation number of storage in the storage unit 21, with reference to the setting table of storage in storage unit 21, sets setting (S19).

Fig. 5 is the synoptic diagram that is illustrated in an example of the setting table of storage in the storage unit 21 that the image processing system 100 of embodiment of the present invention had.

In the setting table, storing accumulation number (thousand sheets) and setting.In the illustrative in the drawings setting table; At the accumulation number is under the situation below 10,000; Setting is " 40 ", is that setting is " 25 " under the situation below 20,000 at the accumulation number, is that setting is " 20 " under the situation below 30,000 at the accumulation number; Surpass under 30,000 the situation at the accumulation number, setting is " 15 ".That is, according to the increase of accumulation number, setting is less.

The relation of accumulation number and setting is obtained for example experimentally, and registered in advance is in the setting table.

If the accumulation number of storage is for example 10,000 5 thousand sheets in storage unit 21, then in the processing of S19 shown in Figure 3, image quality adjustment unit 20 is set setting " 25 ".Equally, if the accumulation number of storage is for example 30,000 5 thousand sheets in storage unit 21, then image quality adjustment unit 20 is set setting " 15 ".

In this embodiment; Even in S16, implemented under the situation of simple procedure control of monochrome image or implemented under the situation of simple procedure control of coloured image; The setting of in S19, setting is all identical; But also can be in S14, to calculate separately under the situation of accumulation number of accumulation number and monochrome image of coloured image, implement the different setting of setting under situation and the situation that the simple procedure of having implemented coloured image is controlled of simple procedure control of monochrome image.

As shown in Figure 3; Image quality adjustment unit 20 judges whether the cumulative error score value of storage in storage unit 21 is (S20) more than the setting of in the processing of S19, setting; Because (S20: not) under situation less than setting; Image quality is stable, so does not implement N-process control and make to handle to return S11.Image quality adjustment unit 20 among the S20 works as implementing judging part.

At the cumulative error score value is (S20: be) under the situation more than the setting, and image quality adjustment unit 20 accesses and carries out and carries out subroutine (with reference to Fig. 6) that N-process control implements to handle (S21).

Fig. 6 is illustrated in the process flow diagram that the subroutine of treatment step is implemented in the N-process control of carrying out in the image processing system 100 of embodiment of the present invention.

Image quality adjustment unit 20 controlling recording control modules 30; Thereby form to solidify and repair image (S41); Obtain optical reflection concentration (S42) as the testing result of reflection density sensor 23a; Based on the optical reflection concentration that is obtained, calculate the charged controlling value (S43) of the optical reflection concentration of regulation, and the regular charged controlling value that will calculate is set in record cell 300 (S44).The processing of S31～S34 during the processing of such S41～S44 and simple procedure control are implemented to handle is roughly the same, therefore omits its detailed description.

After the finishing dealing with of S44, image quality adjustment unit 20 controlling recording control modules 30, thus repair image (S45) in the middle of forming.

Under the situation of the processing of having carried out S45; 30 couples of charged roller 103a of record control unit apply the voltage with charged controlling value of in record cell 300, setting; In addition; Make exposing unit E change the exposure control value and the photoconductor drum 101a that makes public, thereby repair image in the middle of on photoconductor drum 101a, forming tens.

Then; Image quality adjustment unit 20 is obtained the testing result of reflection density sensor 23a; Promptly; Obtain the middle optical reflection concentration (S46) of repairing image that on photoconductor drum 101a, forms, and based on the optical reflection concentration that is obtained, the exposure control value (S47) of the gamma characteristic value that calculating can obtain stipulating.

At last, image quality adjustment unit 20 is set in the exposure control value (S48) that calculates among the S47 at record cell 300, and original program is returned in processing.

Such S41 and the image quality adjustment unit 20 among the S45 form control assembly as the 2nd and work.Image quality adjustment unit 20 among S42 and the S46 utilizes reflection density sensor 23a to obtain parts as the 2nd concentration and works, and the image quality adjustment unit 20 among S43 and the S47 works as the 2nd calculating unit.Image quality adjustment unit 20 among S44 and the S48 works as the 2nd set parts.

That kind as shown in Figure 3, the regular charged controlling value of in the N-process control of S21 is implemented to handle, calculating (S22) is rewritten and be stored as to the regular charged controlling value that image quality adjustment unit 20 will be stored in storage unit 21.

At last, the cumulative error score value that image quality adjustment unit 20 will be stored in storage unit 21 is reset to " 0 " (S23), handles and returns S11.

Above result, even for example the record number is for more than the regulation number, but as long as the cumulative error score value, is not then implemented N-process control less than setting.Wherein, the cumulative error score value is the stable situation of image quality less than the situation of setting, in addition, adjusts charged controlling value owing to implementing simple procedure control, even therefore do not implement N-process control, image quality is not had bad influence yet.

And, even for example the cumulative error score value is equal values (for example " 20 "), under the situation of accumulation number few (10,000 5 thousand sheets), do not implement N-process control yet, under the situation of accumulation number many (30,000 5 thousand sheets), implement N-process control.This is because along with the increase of accumulating number, promptly forms the increase of number of times along with image, and therefore deteriorations such as photoconductor drum 101a～101d and two-component developer only then can not stablize image quality through simple procedure control.In this embodiment, carry out N-process control continually according to the increase of accumulating number, therefore help the stabilization of image quality.

In this embodiment,, judge and whether implement N-process control, but be not limited to this based on the cumulative error score value that has utilized simple charged controlling value and nearest regular charged controlling value.For example, also can be that difference value in simple charged controlling value and nearest regular charged controlling value has surpassed the structure of implementing N-process control under the situation of setting.

Wherein, under situation about judging, under all the time little situation of difference value, do not implement N-process control fully based on difference value.On the other hand, under situation about judging,, therefore can implement N-process control, realize the stabilization of image quality in appropriate timing even the little cumulative error score value of difference value always surpasses setting based on the cumulative error score value.

The structure that the difference value of simple charged controlling value that in addition, also can be based on this and last simple charged controlling value is judged.

Based on the difference value of the charged controlling value of this simple charged controlling value and the regulation in image processing system 100, set in advance, perhaps judge that based on the cumulative error score value of this difference value whether implementing N-process control is fine.But; In record cell 300, reacted the state of environment around the temperature, humidity etc. in the place that image processing system 100 is set in the charged controlling value of actual adjustment automatically; But therefore the state that in the charged controlling value of the regulation of in image processing system 100, setting in advance, does not have the around environment is difficult to judge rightly and should implements the timing of N-process control.

Wherein, photoconductor drum 101a～101d that image processing system 100 is had carries as image and puts body and work, and developing apparatus 102a～102d, charged roller 103a～103d and exposing unit E work as image formation unit.In addition, charged roller 103a～103d also works as charged elements.

In addition, intermediate transfer belt 11 and primary transfer roller 13a～13d work as transfer printing unit, and sheet material delivery unit 301 works as transporting the unit, and reflection density sensor 23a～23d works as the concentration detecting unit.

And counter 221,222 works as the number counter block.In addition, also can be the structure that image quality adjustment unit 20 for example utilizes 21 pairs of records of storage unit number to count.At this moment, on paper used for recording during document image, the record number that 20 pairs of image quality adjustment units are stored in the storage unit 21 increases at every turn.

Therefore the image processing system 100 of above that kind can interrupt images not write down operation owing to when the image recording end of job, implementing simple procedure control in image recording operation way.And, because its required time weak point is compared in simple procedure control with N-process control, though therefore user expectation carries out image record operation in simple procedure control, can wait as long for till simple procedure control end yet.

In addition,, implement N-process control, therefore can remain certain image quality owing to can not stablize under the situation of image quality through simple procedure control.

Promptly; Because N-process control is implemented unlike simple procedure control that kind continually; But implement as required, therefore suppress the deficiency of toner, in addition through the enforcement of process control; Can not reduce the frequency of process control itself, suppress the deterioration of photoconductor drum 101a～101d and two-component developer etc.

In addition, as high concentration with the image quality adjusted value in the process control, in this embodiment illustration charged controlling value, but be not limited to this, also can be suitable for the bias value that primary transfer roller 13a is applied.In addition, also can be to utilize intermediate transfer belt 11 to carry to put body as image, detect the structure of the optical reflection concentration of the repairing image that on intermediate transfer belt 11, forms.

In the scope that does not break away from inner characteristic of the present invention and spirit; The present invention is practical implementation in many ways; Therefore embodiments of the invention are intended to explain and unrestricted; Because protection scope of the present invention is by appending claims but not its instructions limited, various change and replacement equivalents in the claim scope all are regarded as and fall in the claim scope of the present invention.

Claims

1. image quality adjustment method, be used for the image processing system adjustment should be on recording sheet the image quality of images recorded, said image processing system comprises: image formation unit, utilize image to form agent and carry to put at image and form image on the body; Transfer printing unit will carry at said image through this image formation unit and put the image that forms on the body and be transferred to recording sheet; Transport the unit, transported through this transfer printing unit transfer printing the record images sheet material; The concentration detecting unit detects and carries the concentration of putting the image that forms on the body at said image; And the image quality adjustment unit, adjustment should be on recording sheet the image quality of images recorded, said image quality adjustment method comprises:

Finish determination step, judge and whether finish based on said the transporting of recording sheet that transports the unit;

The number determination step, judge said image quality adjustment unit adjusted said transfer printing unit transfer printing after the image quality record number of record images sheet material whether be more than the regulation number;

The 1st image quality set-up procedure; In said end determination step, be judged to be end; And in said number determination step, being judged to be is under the situation more than the regulation number; Make said image formation unit utilize the image of ormal weight to form agent and carry the repairing image of putting formation stated number on the body at said image; And based on the concentration of formed repairing image, regulate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded, utilize the image quality adjusted value of being regulated to make said image formation unit form image;

Implement determination step, be based on the image quality adjusted value of regulating in the 1st image quality set-up procedure, judge the adjustment of whether further implementing image quality; And

The 2nd image quality set-up procedure; In this enforcement determination step, be judged to be under the situation of enforcement; The image that said image formation unit utilization is Duoed than said ormal weight forms agent and carries to put at said image and form the repairing image of Duo than said stated number on the body, and based on the concentration of formed repairing image, adjusting be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded; Utilize the image quality adjusted value of being regulated to make said image formation unit form image

Said image quality adjustment method also comprises:

The accumulation step, in said the 2nd image quality set-up procedure, regulate the image quality adjusted value after, the absolute value of the difference of image quality adjusted value of in said the 1st image quality set-up procedure, regulating and the image quality adjusted value of in said the 2nd image quality set-up procedure, regulating is accumulated,

Wherein, carrying out under the situation of said enforcement determination step, be based on accumulation results in the said accumulation step and whether be setting with on judge whether implement.

2. image quality adjustment method, be used for the image processing system adjustment should be on recording sheet the image quality of images recorded, said image processing system comprises: image formation unit, utilize image to form agent and carry to put at image and form image on the body; Transfer printing unit will carry at said image through this image formation unit and put the image that forms on the body and be transferred to recording sheet; Transport the unit, transported through this transfer printing unit transfer printing the record images sheet material; The concentration detecting unit detects and carries the concentration of putting the image that forms on the body at said image; And the image quality adjustment unit, adjustment should be on recording sheet the image quality of images recorded, said image quality adjustment method comprises:

The repairing image that in said the 1st image quality set-up procedure, forms is to utilize said image to form agent to be coated with completely said image and to carry the curing that a part of putting body forms and repair image; The repairing image that in said the 2nd image quality set-up procedure, forms is by solidifying the repairing image and solidifying the repairing image beyond the repairing image and constitute; Calculate the 1st image quality adjusted value based on solidifying the concentration of repairing image, calculate the 2nd image quality adjusted value based on solidifying the concentration of repairing the repairing image beyond the image.

3. image processing system comprises:

Image formation unit utilizes image to form agent, carries to put at image to form image on the body;

Transfer printing unit will carry at said image through this image formation unit and put the image that forms on the body and be transferred to recording sheet;

Transport the unit, transported through this transfer printing unit transfer printing the record images sheet material;

The concentration detecting unit detects and carries the concentration of putting the image that forms on the body at said image;

Image quality adjustment unit, adjustment should be on recording sheet the image quality of images recorded;

Finish identifying unit, judge and whether finish based on said the transporting of recording sheet that transports the unit;

Number counting unit, to said image quality adjustment unit adjusted said transfer printing unit transfer printing after the image quality record number of record images sheet material count;

The number identifying unit judges whether the record number of this number counting unit counting is more than the regulation number;

The 1st forms control module; Be judged to be end at said end identifying unit; And it is under the above situation of regulation number that said number identifying unit is judged to be, and makes said image formation unit utilize the image of ormal weight to form agent and carries the repairing image of putting formation stated number on the body at said image;

The 1st concentration obtains the unit, obtains the concentration of the formed repairing image of the 1st formation control module from said concentration detecting unit;

The 1st computing unit is obtained the concentration that the unit is obtained based on the 1st concentration, calculate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded;

The 1st setup unit sets the image quality adjusted value that the 1st computing unit calculates to said image formation unit, so that said image formation unit uses said image quality adjusted value to form image;

Implement identifying unit,, judge the adjustment of whether further implementing image quality based on the decision condition of regulation and the image quality adjusted value of said the 1st computing unit calculating;

The 2nd forms control module, is judged to be under the situation of enforcement at this enforcement identifying unit, makes the image that said image formation unit utilization is Duoed than said ormal weight form agent, carries to put at said image to form the repairing image of Duoing than said ormal weight on the body;

The 2nd concentration obtains the unit, obtains the concentration of the repairing image of the 2nd formation control module formation from said concentration detecting unit;

The 2nd computing unit is obtained the concentration that the unit is obtained based on the 2nd concentration, calculate be used to adjust should be on recording sheet the image quality adjusted value of the image quality of images recorded; And

The 2nd setup unit sets the image quality adjusted value that the 2nd computing unit calculates to said image formation unit, so that said image formation unit utilizes said image quality adjusted value to form image,

Also comprise the accumulation unit, after said the 2nd computing unit calculated the image quality adjusted value, the absolute value of the difference of the image quality adjusted value that image quality adjusted value that said the 1st computing unit is calculated and said the 2nd computing unit calculate was accumulated,

Wherein, said enforcement identifying unit based on the accumulation results of said accumulation unit whether be setting with on judge.

4. image processing system as claimed in claim 3, wherein

Said image formation unit comprises carries said image to put the charged charged elements of body,

Said the 1st computing unit and the 2nd computing unit utilize the magnitude of voltage of the voltage that is applied to said charged elements as the image quality adjusted value that should calculate respectively.

5. like claim 3 or 4 described image processing systems, wherein

According to the accumulation number of having accumulated said record number what, change said decision condition.

6. like each described image processing system of claim 3 to 4, wherein

Increase according to the accumulation number of having accumulated said record number reduces said setting.

7. image processing system comprises:

The said the 1st to form repairing image that control module forms be to utilize said image to form agent to be coated with completely said image and to carry the curing that a part of putting body forms and repair image,

The said the 2nd to form repairing image that control module forms be to repair image and repair the repairing image beyond the image and constitute with solidifying by solidifying,

Said the 2nd concentration obtains the unit and obtains the concentration separately that the curing of said the 2nd formation control module formation is repaired image and solidified repairing image repairing image in addition,

Said the 2nd computing unit calculates the 1st image quality adjusted value based on the concentration that said the 2nd concentration obtains the curing repairing image of obtaining the unit, obtains the curing that obtains the unit based on said the 2nd concentration and repairs the concentration of the repairing image beyond the image and calculate the 2nd image quality adjusted value.

8. image processing system as claimed in claim 7, wherein

9. like claim 7 or 8 described image processing systems, wherein

10. like claim 7 or 8 described image processing systems, wherein